Sweden is known for its heavy infantry, cavalry, and skilled musketeers. These aspects combined, Sweden is one of the most powerful factions. Crimean and Cossack Hetmanate cavalry can easily deal with Swedish shock infantry, but Swedish miquelet muskets, if in proper numbers, can prevent this. Polish Winged Hussars are perhaps Sweden's most challenging opponent. These hussars can ride through musket ranks and heavy infantry ranks. Swedish cavalry is capable of preventing this, but they are expensive to maintain and do not have the shooting skill of Cossack cavaliers, except the top-ranking Swedish Reiter, who is also equipped with the Good Broadsword, the most powerful one handed weapon in the game, although it's plagued with having the slowest speed of a sword in the game. When the horsemen are not shooting at enemies, they can ride through the ranks wielding said weapon, which has been noted to split groups up effectively. All in all, Sweden is a very general faction able in most all situations.

Out of all of the nations in Eastern Europe, the Kingdom of Sweden is the only one that exists in modern times as it does in With Fire & Sword, with only slight differences: its territories in Latvia, Estonia, and Lithuania are no longer Sweden's, and Finland is independent.

The Kingdom of Sweden was not fully shown in With Fire & Sword, because Sweden itself wasn't featured, and not all of Finland was shown either.

Ratsherr, a title shared by several Swedish vassals, is German for councilor, which would mean that these vassals were members of the Privy Council of Sweden, key advisers (and occasional co-rules) to the Swedish monarch. The title in Swedish would be "Rådsherre".